Pump.



W. L.- HAMILTON.

PUMP.

APPLICATION FILED MAY 6, 1911.

2 SHEETS-SHEBT 1.

Patented N 0V. 14, 1911.

W/TNESSES:

ATTUR/VEVS W. L. HAMILTON.

PUMP.

' APPLICATION FILED MAYG, 1911.

2 SHEETS-SHEET 2.

mom/frs WITNESSES:

UNITED sTATEs PATENT OFFICE.

WILLIAM L. HAMILTON, or BANGOR, MICHIGAN.

PUMP.

Specieation of Letters Patent. Patented Nov, 14, 11911,

Application med May 6, l1911. Serial No. 625,459.

To all 'whom it may concern:

Be it known that I, W'ILLIAM L. HAMIL- TON, a citizen of the United States, and a residentl of Bangor, in the county of Van Buren and State of Michigan, have invented a new and Improved Pump, of which the following is a full, clear, and exact descrip- ;tion. a

This invention relates to a new and im roved pump of a type adapted to force any uid, such as water or air, and further, of a t'ype which will automatically regulate lts own pressure without the need ofextraneous relief valves.

It has been found inv actual practice that while some types of relief valves are quite eiieient and will relieve excess pressure, with greater or less regularity, the majority of relief valves cannot be epended upon to act at a definite predetermined pressure, but will vary in their action, coming in play sometimes at one pressure and sometimes at' another pressure. It has also been found that the relief valves sometimes will not seat until the'pressure has gone considerably below that which is desired. In addition to,

positive in its action, and easily controlled.

A still further object of this invention is to provide means governed by the pressure of the fluid pumped by the pump'for controlling the action of one of the valves of the v pump, whereby the pressure of the ,fluid pumped can be controlled.

These and further objects, together with the construction and combination of parts, will be more fully described hereinafter and particularly set forth in the claims.

Reference is to be had to the accompanying drawings forming a part of this specification, in which similar characters of reference indicate corresponding parts in all the views, and in whichy Figure 1 is a vertical section through the pump; Fig. 2 is a partial section taken at right-angles to,r the section taken in Fig. 1,

through one .of the suction checks; Fig. 3 is an enlarged fragment-ary vsection of the regulator shown-in Fig. 2; Fig. 4 is a perspective view of the reinforcing gasket for t e movable diaphragm; Fig. 5 is a perspective view of the control for one of the valves, which in this instance is shown as the suction check valve; and Fig. 6 is an inverted perspective View of the 'check valve. Referring more l'particularly to` the .separate parts of this invention as embodied in the form shown in the drawings, 1 indicates a pump, which may be of any suitable character, and is shown as being provided with a cylinder 2 located in a casin 3, and spaced apart from the heads thereo so as to form pressure chambers. Slidingly mounted in the cylinder 2 in any suitable manner, so as t'o afford ay fluid-ti ht tit, there is provided a piston 4, which is adapted to be reci rocated by a piston rod 5, which exten s through one of the heads of the pump,

and may be driven in any suitable manner from any suitable source of power. The suction inlets for the pump, of which there are two, shown at 6, one for each end of the cylinder, are controlled by automaticallyacting check-valves 7, the particular form of which may be seen by reference to Fig. 6. While any suitable form may be used, this form of valve gives a positive action, and is well guided in the seats of the valves, indicated at 8, each having an opening therein forming the suction inlets-6. Outlets for the active portion of the pump are indicatedat 9 and v10,A and are controlled by gravity check-valves or any' other suitable t'ype 11 and 12. The check-valves 11 and 12 separate the active orpumping compartments'of the pump from a common storing chamber 13, which communicates with a storing excess pressure abovevthat desired. In this case, I have done away with thisv by rendering the pump more or less'inefective, by

preventing one or more of the valves thereof from properly seating. While'any of the valves might be regulated in th1s manner,

I prefer to regulate the check valves 7, controlling the suction inlets. For this purpose,

I provide in each instance a regulator- 16,

which'is provided with a diaphragm 17 preferably flexible in its nature and of any suitable 'mater-ial, such asl rubber. The diaphragm 17 is exposed to the pressure of the fluid in the pump, and is normally held in a'position such that it can be moved by an .excess pressure in the pump, by means of a spring 18. In'the case of high-pressure pumps, 1tA

may be necessary to reinforce this dia- A 2o phragm to prevent it from blowing out.

threaded connection therewith. The spring 18 rests at-one end on the washer 20, and at its opposite end on a collar 22, which bears on an adjuster 23, in the form .of a screw- 35 threaded sleeve, which engages a screwthreaded opening in the frame 119, whereby the tension of the spring'18 can be varied,

, and thus Athe pressure at'which the dia- --phragm will operate will also vary. A

'40 thumb screw 24 engages the upper screwthreaded end ofthe rod 21, the latter prol'jecting through the sleeve adjuster 23, and said thumb-screw or nut 24 may thus lock the parts together, so that new diaphragme can be put inv without danger of the segments of `the washer falling out and causing trouble. v

Adjustably secured to the lower end of each of the rods 21, as by means of a screwl threaded. engagement, and thus operatively connected to the diaphragm 17, there is provided a controller v25, which forms the connecting link between the rest of the mecha- 'nism of the regulator and each of the valves 7. These controllers have arms which en- "5 gage under the rims of the valves 7, and serve. to lift the valves if they are 'already seated, or prevent them from seating when the diaphragms are lraised by an excessive pressure in the pump, thus in a `way,.forming a lift or a stop, according to conditions, generally the latter. The operation of the device will bereadily understood when takenl in connection with the above description. Under normal conditions, the piston 4 reciprocates back and forth, piling ulp a pressure in the storing chamber 14, w ich may be simultaneously -utilized through the outlet 15. In case this pressure and the pressure in thev pump proper exceeds a certain redetermined limit, one -or the other of the diaphragms 17, which are normally in their .innermost or lowermost position, will be forced outwardly and upwardly against the tension of the spring 18, thereby lifting thel controller 25, which will prevent one of the check-valves 7 fromv properlyseating, so that the pump, instead -of forcing the .fluid into the storing member 14, will merely force it back into the suction or supply pipe of the pump through the' suction inlet 8. It will thus be seen that the piston will merely churn the water, and not add to the pressure in the storing chamber 14. Under such circum- '85-` stances, if the fluid being pumped is being used through the outlet 15, the pressure will gradually diminish until it reaches a point where the force of one of the springs 18 will be greater than the pressure in the 90 pump, thus permitting the raised diaphragm to lower, and thus permitting the valve 7 to seat itself, whereupon the pressure will immediately' climb up to any predetermined amount, depending on theinitial tension of the springs 18, whichcanbe regulated by the adjusters 23.

While I have shown one embodiment of my invention, I do not Wish to be limited to the specific details thereof, but desire to be protected in various changes, alterations and modifications which may come within the scope of the appended claims. c

Having thus described vmy invention, I claim as new and desire to secure by Letters 16a Patent f 1. The combination with a pump, of a 4check valve for said pump, a diaphragm exposed to the fluid pressure of said pump, a screw-threaded rod extending through said diaphragm,awasher having a screw-threaded adjustable connection with said rod and contacting with said diaphragm so that the movement .of said diaphragm will be transmitted to said rod, a control adjustably connected to said rod and engagingsaid valve ,so that the movement of said rod and said diaphragm will be transmitted to said valve, said control being in the form of an annular ring having a bracket extending upwardly v therefrom and engaging said rod, said annular ring being located subjacent a portionvk of-said valve, a spring contacting with said washer, so as to oppose the movement of said diaphragm, and means for adjusting the tension on said yspring so as to vary the pressure at which said diaphragm will move.

. 2. The combination with a pump, of ay check valve for said pump normally sensitive to the suction and compression action A of the pump and having a rim, a control for renderlng said valve unresponsive to the pump action comprising a bracket having a portion engaging the valve subjacent its rim, a rod having connection with said bracket, a flexible diaphragm exposed to the iuid pressure of the pump and arranged above the bracket, a Washer adjustable on said rod and engaging said diaphragm to clamp the same against said bracket, and a spring bearing against'said Washer to oppose thepressure-wise movement of the diaphragm.

3. The combination With a pump, of a check valve for the pump, normally sensitive to the suction and compression action of the pump, and having a rim, a control for rendering said valve unresponsive to the pump action comprislng a bracket having a portion engaging the valve subjacent its rim, and provided with a threaded opening, a flexible diaphragm exposed to the fluid pressure of the pump, a rod extending through said diaphragm -and having la threaded end for adjustable engagement in said bracket opening, a washer threaded upon said rod to bear upon said diaphragm and clamp the same against the bracket, a

spring bearing against` the Washer to oppose WILLIAM L. HAMILTON. 

